公开(公告)号：US07715728B2

公开(公告)日：2010-05-11

申请号：US11581703

申请日：2006-10-16

申请人： Masaru Kijima ,  Kazuhiro Sakai ,  Tsutomu Hamada ,  Yoshihide Sato

发明人： Masaru Kijima ,  Kazuhiro Sakai ,  Tsutomu Hamada ,  Yoshihide Sato

IPC分类号： H01S3/13

CPC分类号： G02B6/4201 ,  H01S5/0617 ,  H01S5/06804

摘要： An optical transmitter includes a light-emitting element, a driving circuit, a temperature detection unit, a storage device and a control circuit. The driving circuit causes, based on an input signal, the light-emitting element to emit an optical signal having a pulse shape. The temperature detection unit detects an ambient temperature of the light-emitting element. The storage device stores temperature characteristics information of the light-emitting element. The control circuit controls the driving circuit based on the ambient temperature detected by the temperature detection unit and the temperature characteristic information stored in the storage device, so that an extinction ratio of the optical signal having the pulse shape becomes substantially constant.

摘要翻译： 光发射机包括发光元件，驱动电路，温度检测单元，存储装置和控制电路。 驱动电路基于输入信号使发光元件发射具有脉冲形状的光信号。 温度检测单元检测发光元件的环境温度。 存储装置存储发光元件的温度特性信息。 控制电路基于由温度检测单元检测的环境温度和存储在存储装置中的温度特性信息来控制驱动电路，使得具有脉冲形状的光信号的消光比变得基本恒定。

公开(公告)号：US07625123B2

公开(公告)日：2009-12-01

申请号：US11443014

申请日：2006-05-31

申请人： Katsuo Ishikawa ,  Tsutomu Hamada

发明人： Katsuo Ishikawa ,  Tsutomu Hamada

IPC分类号： F16C32/06 ,  F16C17/10

CPC分类号： F16C33/103 ,  F16C17/026 ,  F16C17/107 ,  F16C33/107 ,  F16C2370/12 ,  H02K7/085 ,  H02K7/086

摘要： A hydrodynamic bearing device including a sleeve (1), a shaft (2), and oil (100). With respect to the sleeve (1), a stepped portion (1b) provided at one end and an inner peripheral face (1e) extending linearly in the axial direction and continuously with the stepped portion (1b) are formed by a working method that involves the use of a metal mold. The shaft (2) is inserted so as to be capable of relative rotation with respect to the inner peripheral face (1e) of the sleeve (1). The oil fills the space formed between the inner peripheral face of the sleeve and the outer peripheral face of the shaft. Dynamic pressure generation grooves (9a and 9b), which open in the axial direction at at least one end in the axial direction of the inner peripheral face (1e) and are continuous in the axial direction from one end, are formed in the inner peripheral face.

摘要翻译： 一种流体动力轴承装置，包括套筒（1），轴（2）和油（100）。 相对于套筒（1），设置在一端的台阶部分（1b）和沿轴向线性延伸并与台阶部分（1b）连续延伸的内周面（1e）通过一种工作方法形成，该方法涉及 使用金属模具。 轴（2）被插入以能够相对于套筒（1）的内周面（1e）相对旋转。 油填充在套筒的内周面和轴的外周面之间形成的空间。 在内周面（1e）的轴向的至少一端沿轴向开口并从一端沿轴向连续的动压发生槽（9a，9b）形成在内周 面对。

公开(公告)号：US20090154851A1

公开(公告)日：2009-06-18

申请号：US12393542

申请日：2009-02-26

申请人： Tsutomu Hamada ,  Takafumi Asada ,  Hideaki Ohno

发明人： Tsutomu Hamada ,  Takafumi Asada ,  Hideaki Ohno

IPC分类号： F16C32/06

CPC分类号： F16C33/107 ,  F16C17/107 ,  F16C33/103 ,  F16C2370/12

摘要： A hydrodynamic bearing device is provided for use with a spindle motor. The hydrodynamic bearing device has a sleeve made of a sintered metal that is obtained by sintering a sintering material that is iron, an iron alloy, copper, a copper alloy or a mixture thereof. This sintered metal has independent pores, which do not communicate with each other, by selecting conditions for forming a desired sintered body within a predetermined range. The conditions includes a grain size of powdered metal of a material for the sintered metal, a molding pressure when the molded body is formed, sintering temperature and sintering period in the sintering step.

摘要翻译： 提供一种用于主轴电机的流体动力轴承装置。 流体动力轴承装置具有通过烧结作为铁，铁合金，铜，铜合金或其混合物的烧结材料而获得的烧结金属制的套筒。 该烧结金属通过选择在预定范围内形成所需烧结体的条件，具有不相互连通的独立孔。 条件包括烧结金属材料的金属粉末的粒度，成型体的成形压力，烧结温度和烧结时间。

公开(公告)号：US20090152968A1

公开(公告)日：2009-06-18

申请号：US12320256

申请日：2009-01-22

申请人： Katsuo Ishikawa ,  Tsutomu Hamada

发明人： Katsuo Ishikawa ,  Tsutomu Hamada

IPC分类号： H02K5/167

CPC分类号： H02K5/1675 ,  H02K1/02 ,  H02K1/146 ,  H02K5/00

摘要： A spindle motor including a rotor hub which is rotationally driven by a magnetic action of a rotational magnetic field generated when a current is applied to a wire wound around teeth of a stator core and a magnetic field of a magnet provided on a rotor. Herein, the stator core formed by laminating magnetic steel plates is mounted to an outer periphery of a supporting part of a rotation support shaft of the rotor hub, and the supporting part is made of sintered metal containing a ferromagnetic material. This spindle motor can suppress generation of vibration and noise even when it is reduced in size.

摘要翻译： 一种主轴电动机，其包括转子毂，所述转子毂由当电流施加到缠绕在定子芯的齿上的线和设置在转子上的磁体的磁场时产生的旋转磁场的磁作用旋转驱动。 这里，通过层叠电磁钢板形成的定子铁心安装在转子轮毂的旋转支撑轴的支撑部的外周，支撑部由含铁磁材料的烧结金属制成。 即使减小了主轴电机，也能够抑制振动和噪音的产生。

公开(公告)号：US20090073596A1

公开(公告)日：2009-03-19

申请号：US12169474

申请日：2008-07-08

申请人： Takafumi Asada ,  Tsutomu Hamada ,  Katsuo Ishikawa

发明人： Takafumi Asada ,  Tsutomu Hamada ,  Katsuo Ishikawa

IPC分类号： G11B5/02 ,  F16C17/10 ,  H02K15/14

摘要： A hydrodynamic bearing device comprises a sleeve composed of a sintered member, a shaft that is inserted in a state of being capable of relative rotation into a bearing hole provided to the sleeve, and a hydrodynamic groove formed in the outer peripheral surface of the shaft and/or the inner peripheral surface of the sleeve. The sleeve has a surface porosity of 1.5% or less, and the ridge width is at least 0.10 mm.

摘要翻译： 流体动力轴承装置包括由烧结构件构成的套筒，以能够相对旋转到设置于套筒的轴承孔的状态插入的轴和形成在轴的外周面中的流体动力槽， /或套筒的内周面。 套筒的表面孔隙率为1.5％以下，脊宽度为0.10mm以上。

公开(公告)号：US07444083B2

公开(公告)日：2008-10-28

申请号：US10886650

申请日：2004-07-09

申请人： Yuichi Ohashi ,  Kenji Matsumoto ,  Hiroyuki Hiiro ,  Yoshisada Nakamura ,  Mikihiko Kato ,  Osamu Ueno ,  Tsutomu Hamada ,  Shinya Kyozuka ,  Hideo Nakayama ,  Tomo Baba

发明人： Yuichi Ohashi ,  Kenji Matsumoto ,  Hiroyuki Hiiro ,  Yoshisada Nakamura ,  Mikihiko Kato ,  Osamu Ueno ,  Tsutomu Hamada ,  Shinya Kyozuka ,  Hideo Nakayama ,  Tomo Baba

IPC分类号： H04B10/00 ,  H04B10/12 ,  H01S5/00 ,  H01S3/08

CPC分类号： G02B6/02038 ,  G02B6/0288 ,  G02B6/425 ,  H04B10/2581

摘要： In an optical signal transmission system which can perform high-speed optical transmission not lower than 1 Gbps, VCSEL has light-emission points. A core diameter of an optical fiber GI-POF is set to not lower than 200 μm, and the light-emission points of VCSEL are arranged inside an outer periphery at an end face of GI-POF. A polymerization composition material constituting the core of GI-POF is made of a compound containing deuterated poly methacrylic ester. A wavelength of the light beam of VCSEL is set to the range of 770 nm to 810 nm.

摘要翻译： 在能够执行不低于1Gbps的高速光传输的光信号传输系统中，VCSEL具有发光点。 光纤GI-POF的纤芯直径设定为不低于200μm，VCSEL的发光点布置在GI-POF的端面的外周的内侧。 构成GI-POF核心的聚合组合物由含有氘化聚甲基丙烯酸酯的化合物制成。 VCSEL的光束的波长设定在770nm〜810nm的范围。

公开(公告)号：US07186028B2

公开(公告)日：2007-03-06

申请号：US11071212

申请日：2005-03-04

申请人： Takafumi Asada ,  Tsutomu Hamada ,  Hideaki Ohno ,  Yasunori Tokunou

发明人： Takafumi Asada ,  Tsutomu Hamada ,  Hideaki Ohno ,  Yasunori Tokunou

IPC分类号： F16C17/02

CPC分类号： F16C17/107 ,  F16C33/1025 ,  F16C2370/12 ,  Y10S384/902

摘要： A hydrodynamic bearing device capable of inhibiting leakage of a working fluid to an outside of a bearing and preventing reduction in radial bearing rigidity, and capable of keeping a gap between a thrust bearing and a radial bearing favorable and rotating stably. The hydrodynamic bearing device includes a shaft relatively rotatably inserted into a bearing hole of a sleeve, a radial bearing surface having dynamic pressure generating grooves formed on at least one of an outer peripheral surface of the shaft and an inner peripheral surface of the sleeve, and a gap filled with a working fluid between the shaft and the sleeve. The shaft is made of high manganese chrome steel or stainless steel, and the sleeve is entirely made of sintered metal of metal particles including at least 60% by weight of iron or copper. Resin, metal or water glass is impregnated in pores on a surface of the sintered metal and cured. Thereby, leakage of the working fluid to the outside of the bearing from the sleeve can be inhibited, and reduction in the pressure inside the bearing can be prevented.

摘要翻译： 一种流体动力轴承装置，其能够抑制工作流体泄漏到轴承的外部，并且防止径向轴承刚性的降低，并且能够使推力轴承和径向轴承之间的间隙保持良好并且稳定地旋转。 流体动力轴承装置包括相对可旋转地插入到套筒的轴承孔中的轴，具有形成在轴的外周表面和套筒的内周表面中的至少一个上的动压产生槽的径向支承表面，以及 在轴和套筒之间填充有工作流体的间隙。 该轴由高锰铬钢或不锈钢制成，并且套筒全部由包含至少60重量％的铁或铜的金属颗粒的烧结金属制成。 将树脂，金属或水玻璃浸渍在烧结金属表面上的孔中并固化。 由此，可以抑制工作流体从套筒向轴承外侧的泄漏，能够防止轴承内的压力的降低。

公开(公告)号：US20070047857A1

公开(公告)日：2007-03-01

申请号：US11509770

申请日：2006-08-25

申请人： Tsutomu Hamada ,  Takafumi Asada ,  Katsuo Ishikawa

发明人： Tsutomu Hamada ,  Takafumi Asada ,  Katsuo Ishikawa

IPC分类号： F16C33/02 ,  F16C32/06

CPC分类号： F16C33/14 ,  F16C17/107 ,  F16C2220/20 ,  F16C2220/60 ,  F16C2223/04 ,  F16C2223/08 ,  F16C2370/12

摘要： A bearing stiffness of a sintered metal sleeve is prevented from lowering. A sleeve includes an inner section formed of metal powder for sintering and a resin for impregnation, and a surface deformation section which covers a surface of the inner section and is formed by shot blast process. Since the surface deformation section is formed by the shot blast process, the number of pores formed between the metal powder for sintering near the surface can be reduced. In this way, a supporting pressure at a bearing portion can be prevented from being released out through the pores, and the bearing stiffness can be prevented from lowering.

摘要翻译： 防止烧结金属套筒的轴承刚度降低。 套筒包括由用于烧结的金属粉末形成的内部部分和用于浸渍的树脂，以及覆盖内部部分的表面并通过喷丸处理形成的表面变形部分。 由于通过喷丸法形成表面变形部，因此可以减少在表面附近烧结用金属粉末之间形成的细孔数。 以这种方式，可以防止轴承部分处的支撑压力通过孔排出，并且可以防止轴承刚度的降低。

公开(公告)号：US20060090921A1

公开(公告)日：2006-05-04

申请号：US11124057

申请日：2005-05-09

申请人： Yoshihide Sato ,  Hisayoshi Mori ,  Kazuhiro Sakai ,  Tsutomu Hamada ,  Masaru Kijima

发明人： Yoshihide Sato ,  Hisayoshi Mori ,  Kazuhiro Sakai ,  Tsutomu Hamada ,  Masaru Kijima

IPC分类号： H01R9/05

CPC分类号： H01R9/032 ,  H01R13/562 ,  H01R13/6592

摘要： A terminal end shielding method of a shielded cable, including the steps of: forming a first electrically-conductive thin film, which is elastic, on a peripheral surface of an outer skin end portion at a shielded cable terminal end portion at which a shielding member is exposed by a predetermined length from the outer skin end portion of a free end side; bending the shielding member and making the shielding member contact the electrically-conductive thin film; forming a second electrically-conductive thin film, which is elastic, on the shielding member which contacts the electrically-conductive thin film; and pressing and fixing a portion at which the second electrically-conductive thin film is formed, by a shielded cable nipping means.

公开(公告)号：US07035503B2

公开(公告)日：2006-04-25

申请号：US10388659

申请日：2003-03-17

申请人： Tsutomu Hamada ,  Takeshi Kamimura ,  Kazuhiro Suzuki ,  Kazuhiro Sakai ,  Masashi Hisada

发明人： Tsutomu Hamada ,  Takeshi Kamimura ,  Kazuhiro Suzuki ,  Kazuhiro Sakai ,  Masashi Hisada

IPC分类号： G02B6/28 ,  H04B10/20 ,  H04B7/212

CPC分类号： H04B10/278 ,  H04B10/272

摘要： Master node #0 and a plurality of slave nodes #1 to #4 are connected to one another via a plurality of optical couplers 20. Each of the nodes is controlled so that signal transmission between the nodes by a bus connection and a link connection is conducted via the optical couplers. In the link connection, the master node transmits bit signals corresponding to the number of the slave nodes. Each of the slave nodes transmits a bit signal with allocating the signal to a predetermined bit.

摘要翻译： 主节点＃0和多个从节点＃1至＃4经由多个光耦合器20相互连接。 每个节点被控制，使得通过总线连接和链路连接的节点之间的信号传输通过光耦合器进行。 在链路连接中，主节点发送与从节点数相对应的比特信号。 每个从节点通过将信号分配给预定位来发送位信号。